Transcript for Ex-Cop Grilled in Pistorius Trial for Mishandled Evidence

A whole lot coming up. Right to the latest in the Oscar Pistorius trial. Matt Gutman is at the courthouse. Good morning, Matt. Reporter: Good morning, George. For anyone in this country to own a gun, they have to pass this 50-question test that we have obtained, including Oscar Pistorius. This morning, the prosecution alleging it was illegal for him to have fired his weapon at all that night and he knew it. This morning, prosecution using Oscar Pistorius' own words against him. Can you just fiebly use legal force against them. The answer is no it does not condone danger. Reporter: He filled in a questionnaire. The prosecution using his own written answers knowing he should never have blindly fired bullets into the bathroom door, killing his girlfriend. That bloody scene played out if forensic photos in court again. As we have seener inially every day, Pistorius covering his face. For the first time, the mother of reeva steenkamp was in court. Those forensic pictures of Oscar Pistorius' bloody prosthetics too much for reeva steenkamp's mother. She had to rush out of the courtroom. The next item is a self-loading rifle, again. Reporter: He never took possession of them because of his arrest. Did you know at the time that he carried a gun everywhere he wept? I heard he had guns. But you thought he mainly had guns for shooting. Reporter: His former agent spoke exclusively to ABC news. You don't hunt with a parabellum 0.9 millimeter. No, not at all. Reporter: A rough week for the prosecution. Own Friday, one of the key police witnesses testified his men mishandled the possible murder web. He was handling it without gloves. He said sorry. He put the magazine back. Reporter: Everyone admitting they may have stolen one of Pistorius' watches. The same thing for anyone. Because this is an expensive watch. Reporter: The prosecution took a beating last week. This questionnaire may change things for them. It may show she committed at least one fire arms offense.

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